Bump browserslist from 4.16.0 to 4.16.6 in /site (#6361)

Bumps [browserslist](https://github.com/browserslist/browserslist) from 4.16.0 to 4.16.6.
- [Release notes](https://github.com/browserslist/browserslist/releases)
- [Changelog](https://github.com/browserslist/browserslist/blob/main/CHANGELOG.md)
- [Commits](https://github.com/browserslist/browserslist/compare/4.16.0...4.16.6)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

site/package-lock.json

@@ -1581,16 +1581,42 @@
       "dev": true
     },
     "browserslist": {
-      "version": "4.16.0",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.16.0.tgz",
-      "integrity": "sha512-/j6k8R0p3nxOC6kx5JGAxsnhc9ixaWJfYc+TNTzxg6+ARaESAvQGV7h0uNOB4t+pLQJZWzcrMxXOxjgsCj3dqQ==",
+      "version": "4.16.6",
+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.16.6.tgz",
+      "integrity": "sha512-Wspk/PqO+4W9qp5iUTJsa1B/QrYn1keNCcEP5OvP7WBwT4KaDly0uONYmC6Xa3Z5IqnUgS0KcgLYu1l74x0ZXQ==",
       "dev": true,
       "requires": {
-        "caniuse-lite": "^1.0.30001165",
-        "colorette": "^1.2.1",
-        "electron-to-chromium": "^1.3.621",
+        "caniuse-lite": "^1.0.30001219",
+        "colorette": "^1.2.2",
+        "electron-to-chromium": "^1.3.723",
         "escalade": "^3.1.1",
-        "node-releases": "^1.1.67"
+        "node-releases": "^1.1.71"
+      },
+      "dependencies": {
+        "caniuse-lite": {
+          "version": "1.0.30001228",
+          "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz",
+          "integrity": "sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==",
+          "dev": true
+        },
+        "colorette": {
+          "version": "1.2.2",
+          "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.2.2.tgz",
+          "integrity": "sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==",
+          "dev": true
+        },
+        "electron-to-chromium": {
+          "version": "1.3.736",
+          "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.736.tgz",
+          "integrity": "sha512-DY8dA7gR51MSo66DqitEQoUMQ0Z+A2DSXFi7tK304bdTVqczCAfUuyQw6Wdg8hIoo5zIxkU1L24RQtUce1Ioig==",
+          "dev": true
+        },
+        "node-releases": {
+          "version": "1.1.72",
+          "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.72.tgz",
+          "integrity": "sha512-LLUo+PpH3dU6XizX3iVoubUNheF/owjXCZZ5yACDxNnPtgFuludV1ZL3ayK1kVep42Rmm0+R9/Y60NQbZ2bifw==",
+          "dev": true
+        }
       }
     },
     "buffer": {
@@ -1657,12 +1683,6 @@
       "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
       "dev": true
     },
-    "caniuse-lite": {
-      "version": "1.0.30001171",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001171.tgz",
-      "integrity": "sha512-5Alrh8TTYPG9IH4UkRqEBZoEToWRLvPbSQokvzSz0lii8/FOWKG4keO1HoYfPWs8IF/NH/dyNPg1cmJGvV3Zlg==",
-      "dev": true
-    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -1762,12 +1782,6 @@
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
       "dev": true
     },
-    "colorette": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/colorette/-/colorette-1.2.1.tgz",
-      "integrity": "sha512-puCDz0CzydiSYOrnXpz/PKd69zRrribezjtE9yd4zvytoRc8+RY/KJPvtPFKZS3E3wP6neGyMe0vOTlHO5L3Pw==",
-      "dev": true
-    },
     "commander": {
       "version": "2.20.3",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
@@ -1947,12 +1961,6 @@
         "safe-buffer": "^5.0.1"
       }
     },
-    "electron-to-chromium": {
-      "version": "1.3.633",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.633.tgz",
-      "integrity": "sha512-bsVCsONiVX1abkWdH7KtpuDAhsQ3N3bjPYhROSAXE78roJKet0Y5wznA14JE9pzbwSZmSMAW6KiKYf1RvbTJkA==",
-      "dev": true
-    },
     "emoji-regex": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
@@ -2870,12 +2878,6 @@
         }
       }
     },
-    "node-releases": {
-      "version": "1.1.67",
-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.67.tgz",
-      "integrity": "sha512-V5QF9noGFl3EymEwUYzO+3NTDpGfQB4ve6Qfnzf3UNydMhjQRVPR1DZTuvWiLzaFJYw2fmDwAfnRNEVb64hSIg==",
-      "dev": true
-    },
     "normalize-package-data": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/normalize-package-data/-/normalize-package-data-2.5.0.tgz",